GraphicBuffer.cpp revision 678bdd6349344df254cc0c3377a40fd99e216635 
1/*
2 * Copyright (C) 2007 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#define LOG_TAG "GraphicBuffer"
18
19#include <stdlib.h>
20#include <stdint.h>
21#include <sys/types.h>
22
23#include <utils/Errors.h>
24#include <utils/Log.h>
25
26#include <ui/GraphicBuffer.h>
27#include <ui/GraphicBufferAllocator.h>
28#include <ui/GraphicBufferMapper.h>
29#include <ui/PixelFormat.h>
30
31#include <pixelflinger/pixelflinger.h>
32
33namespace android {
34
35// ===========================================================================
36// Buffer and implementation of android_native_buffer_t
37// ===========================================================================
38
39GraphicBuffer::GraphicBuffer()
40    : BASE(), mOwner(ownData), mBufferMapper(GraphicBufferMapper::get()),
41      mInitCheck(NO_ERROR), mIndex(-1)
42{
43    width  =
44    height =
45    stride =
46    format =
47    usage  = 0;
48    handle = NULL;
49}
50
51GraphicBuffer::GraphicBuffer(uint32_t w, uint32_t h,
52        PixelFormat reqFormat, uint32_t reqUsage)
53    : BASE(), mOwner(ownData), mBufferMapper(GraphicBufferMapper::get()),
54      mInitCheck(NO_ERROR), mIndex(-1)
55{
56    width  =
57    height =
58    stride =
59    format =
60    usage  = 0;
61    handle = NULL;
62    mInitCheck = initSize(w, h, reqFormat, reqUsage);
63}
64
65GraphicBuffer::GraphicBuffer(uint32_t w, uint32_t h,
66        PixelFormat inFormat, uint32_t inUsage,
67        uint32_t inStride, native_handle_t* inHandle, bool keepOwnership)
68    : BASE(), mOwner(keepOwnership ? ownHandle : ownNone),
69      mBufferMapper(GraphicBufferMapper::get()),
70      mInitCheck(NO_ERROR), mIndex(-1)
71{
72    width  = w;
73    height = h;
74    stride = inStride;
75    format = inFormat;
76    usage  = inUsage;
77    handle = inHandle;
78}
79
80GraphicBuffer::~GraphicBuffer()
81{
82    if (handle) {
83        free_handle();
84    }
85}
86
87void GraphicBuffer::free_handle()
88{
89    if (mOwner == ownHandle) {
90        native_handle_close(handle);
91        native_handle_delete(const_cast<native_handle*>(handle));
92    } else if (mOwner == ownData) {
93        GraphicBufferAllocator& allocator(GraphicBufferAllocator::get());
94        allocator.free(handle);
95    }
96}
97
98status_t GraphicBuffer::initCheck() const {
99    return mInitCheck;
100}
101
102void GraphicBuffer::dumpAllocationsToSystemLog()
103{
104    GraphicBufferAllocator::dumpToSystemLog();
105}
106
107android_native_buffer_t* GraphicBuffer::getNativeBuffer() const
108{
109    return static_cast<android_native_buffer_t*>(
110            const_cast<GraphicBuffer*>(this));
111}
112
113status_t GraphicBuffer::reallocate(uint32_t w, uint32_t h, PixelFormat f,
114        uint32_t reqUsage)
115{
116    if (mOwner != ownData)
117        return INVALID_OPERATION;
118
119    if (handle && w==width && h==height && f==format && reqUsage==usage)
120        return NO_ERROR;
121
122    if (handle) {
123        GraphicBufferAllocator& allocator(GraphicBufferAllocator::get());
124        allocator.free(handle);
125        handle = 0;
126    }
127    return initSize(w, h, f, reqUsage);
128}
129
130status_t GraphicBuffer::initSize(uint32_t w, uint32_t h, PixelFormat format,
131        uint32_t reqUsage)
132{
133    GraphicBufferAllocator& allocator = GraphicBufferAllocator::get();
134    status_t err = allocator.alloc(w, h, format, reqUsage, &handle, &stride);
135    if (err == NO_ERROR) {
136        this->width  = w;
137        this->height = h;
138        this->format = format;
139        this->usage  = reqUsage;
140    }
141    return err;
142}
143
144status_t GraphicBuffer::lock(uint32_t usage, void** vaddr)
145{
146    const Rect lockBounds(width, height);
147    status_t res = lock(usage, lockBounds, vaddr);
148    return res;
149}
150
151status_t GraphicBuffer::lock(uint32_t usage, const Rect& rect, void** vaddr)
152{
153    if (rect.left < 0 || rect.right  > this->width ||
154        rect.top  < 0 || rect.bottom > this->height) {
155        LOGE("locking pixels (%d,%d,%d,%d) outside of buffer (w=%d, h=%d)",
156                rect.left, rect.top, rect.right, rect.bottom,
157                this->width, this->height);
158        return BAD_VALUE;
159    }
160    status_t res = getBufferMapper().lock(handle, usage, rect, vaddr);
161    return res;
162}
163
164status_t GraphicBuffer::unlock()
165{
166    status_t res = getBufferMapper().unlock(handle);
167    return res;
168}
169
170status_t GraphicBuffer::lock(GGLSurface* sur, uint32_t usage)
171{
172    void* vaddr;
173    status_t res = GraphicBuffer::lock(usage, &vaddr);
174    if (res == NO_ERROR && sur) {
175        sur->version = sizeof(GGLSurface);
176        sur->width = width;
177        sur->height = height;
178        sur->stride = stride;
179        sur->format = format;
180        sur->data = static_cast<GGLubyte*>(vaddr);
181    }
182    return res;
183}
184
185size_t GraphicBuffer::getFlattenedSize() const {
186    return (8 + (handle ? handle->numInts : 0))*sizeof(int);
187}
188
189size_t GraphicBuffer::getFdCount() const {
190    return handle ? handle->numFds : 0;
191}
192
193status_t GraphicBuffer::flatten(void* buffer, size_t size,
194        int fds[], size_t count) const
195{
196    size_t sizeNeeded = GraphicBuffer::getFlattenedSize();
197    if (size < sizeNeeded) return NO_MEMORY;
198
199    size_t fdCountNeeded = GraphicBuffer::getFdCount();
200    if (count < fdCountNeeded) return NO_MEMORY;
201
202    int* buf = static_cast<int*>(buffer);
203    buf[0] = 'GBFR';
204    buf[1] = width;
205    buf[2] = height;
206    buf[3] = stride;
207    buf[4] = format;
208    buf[5] = usage;
209    buf[6] = 0;
210    buf[7] = 0;
211
212    if (handle) {
213        buf[6] = handle->numFds;
214        buf[7] = handle->numInts;
215        native_handle_t const* const h = handle;
216        memcpy(fds,     h->data,             h->numFds*sizeof(int));
217        memcpy(&buf[8], h->data + h->numFds, h->numInts*sizeof(int));
218    }
219
220    return NO_ERROR;
221}
222
223status_t GraphicBuffer::unflatten(void const* buffer, size_t size,
224        int fds[], size_t count)
225{
226    if (size < 8*sizeof(int)) return NO_MEMORY;
227
228    int const* buf = static_cast<int const*>(buffer);
229    if (buf[0] != 'GBFR') return BAD_TYPE;
230
231    const size_t numFds  = buf[6];
232    const size_t numInts = buf[7];
233
234    const size_t sizeNeeded = (8 + numInts) * sizeof(int);
235    if (size < sizeNeeded) return NO_MEMORY;
236
237    size_t fdCountNeeded = 0;
238    if (count < fdCountNeeded) return NO_MEMORY;
239
240    if (handle) {
241        // free previous handle if any
242        free_handle();
243    }
244
245    if (numFds || numInts) {
246        width  = buf[1];
247        height = buf[2];
248        stride = buf[3];
249        format = buf[4];
250        usage  = buf[5];
251        native_handle* h = native_handle_create(numFds, numInts);
252        memcpy(h->data,          fds,     numFds*sizeof(int));
253        memcpy(h->data + numFds, &buf[8], numInts*sizeof(int));
254        handle = h;
255    } else {
256        width = height = stride = format = usage = 0;
257        handle = NULL;
258    }
259
260    mOwner = ownHandle;
261    return NO_ERROR;
262}
263
264
265void GraphicBuffer::setIndex(int index) {
266    mIndex = index;
267}
268
269int GraphicBuffer::getIndex() const {
270    return mIndex;
271}
272
273// ---------------------------------------------------------------------------
274
275}; // namespace android
276